set terminal png
set output 'humidity.png'
set xdata time
set timefmt "%b %d %H:%M:%S %Y"
# set title "Crawlspace Humidity and Temperature" 
set ylabel "Percent Humidity and Temperature" 
set yrange [40:90]
set xrange [*:*]
set xlabel " "
set grid
set size 1.2 ,0.5
set key top left

plot 'humidity.data' using 1:5 t "Humidity (percent)" with lines, \
     'humidity.data' using 1:(($6 * 1.8) + 32) t "Temperature (F)" with lines